DE102017210396B4 - Mechanical seat position detection - Google Patents

Abstract

Mechanical seat position detector (1) for a vehicle seat, which is guided with a seat rail (2) in a floor rail (3) of a vehicle, with a locking unit (50) for the longitudinal adjustment of the rails (2, 3) to each other, with a mechanical memory Device (5) comprising a position determination unit (6), a position detection unit (7) and a decoupling unit (60), wherein the position determination unit (6) is symmetrically approachable from both directions of the longitudinal adjustment of the vehicle seat and defines a seating position, wherein the position determination unit (6 ) at least from a memory block (15) with a memory wheel (11) and a Radverzahnung (25), wherein the memory wheel (11) via the Radverzahnung (25) directly or indirectly with a rack (24) of the bottom rail (3) into engagement stands and wherein the memory block (15) is so connected to the seat rail (2) that the engagement between the gear teeth (25) and toothed e) can be canceled, characterized in that the memory wheel (11) on a side surface having a control block having a symmetrically extending control cam (56), and at least one receptacle for a means of the position detection unit (7), which as indentation (57) is formed, wherein the indentation (57) serves to determine the memory position, and wherein the position detection unit (7) at least one detection pin (9 ") and a spring (20), wherein the detection pin (9") is arranged in that it bears on the control cam (56) in a biased manner via a first end region via the spring (20), and wherein the detection pin (9 ") is connected to an actuating element (72) of the decoupling unit (60) via a second end region, and the decoupling unit (60) comprises a pawl (67) rotatably mounted via an axle (66), wherein the pawl (67) has an engagement contour (71) and via the engagement contour (71) into an A recess (69) releasably engages an axis (61/66) connected to the locking unit (50), and that the position detecting pin (9 ") is detachably connected to the pawl (67) via the actuating member (72) when the position pin (9 ") engages the recess (57) and is connected to the pawl (67), the pawl (67) is disengaged from the axis (61).

Description

The invention relates to a mechanical seat position detection for a vehicle seat, which is guided with a seat rail in a bottom rail of the vehicle, with a lock for the longitudinal adjustment of the rails to each other.

State of the art

Vehicle seats for driver and front passenger are arranged to adjust an optimal seating position longitudinally displaceable over a rail system on the vehicle floor. A seat arrangement with seat position detection and memory function has the task of storing at least one previously found by seat adjustment favorable position. Are known electrically or electronically operating memory devices that store multiple seating positions, so for example for different drivers, and allow the setting by pressing a button. Furthermore, mechanical memory devices have become known, which allow to store only one seating position, so for example in a particular driver offer the opportunity to find the seat again by simply moving the same to a stored detent position without re-adjustment of the seat.

From the DE 43 33 892 A1 is a manually operable mechanical memory device for storing two individually programmable seating positions, in particular seat longitudinal positions, using rider-carrying substantially in the direction of adjustment rider rails and by a rider engageable and movable transversely to the rider rail stop element, the part of a viewfinder programmer is. In this case, either the viewfinder programming unit or the rider rail are movably coupled to the seat frame, while the respective other part is fixed relative to the vehicle floor. The stop element can be brought from a neutral position to a stop position upon actuation of the unlocking device of the seat adjustment, in which the stop element can come into contact with a unilaterally acting stop surface of a rider when adjusting the seating position and thereby terminates the adjustment process in the direction chosen.

However, a longitudinal adjustment can always realize only in the direction of the attack of the individual rider or with an arrangement of two riders, between the riders.

WO 2016/162 276 A1 discloses a mechanical seat position recognition for a vehicle seat with a mechanical memory device comprising a position determination unit, a position detection unit and a decoupling unit, wherein the position determination unit can be approached symmetrically from both directions of the longitudinal adjustment of the vehicle seat and defines a seating position and wherein the position determination unit consists of a memory block with a memory wheel and a toothed wheel. The memory wheel can be directly or indirectly brought into engagement with a rack of a bottom rail via the gear teeth. The memory block is connected to a seat rail such that the engagement between the toothing and the toothed rack can be canceled.

Furthermore, memory functions with mechanical solutions from the field of so-called "easy entry" - adjuster are known. These are vehicle seats that can be unlatched from their leadership, so that a passenger can easily get into the back seat. It is only important here that the seat again finds the previously set position, whereby the displacement always takes place in one direction towards the memory unit.

A vehicle seat with a memory device for an "easy entry function" is still from the DE 102 02 179 A1 known.

The devices, such as those in the DE 10 2013 203 181 A1 are described, allow only that the seat is pushed all the way forward in the direction of the front of the vehicle, and then exactly this displacement travels back to find the set seating position.

From the DE 690 08 105 T2 is known a vehicle seat with a memory function for an on / off position, in which the vehicle seat is moved backwards.

It is the object of the present invention to provide a seat assembly with manual, mechanical adjustment and seating position detection with memory function that allows a comfortable and fast way, a previously set, individually adapted to a particular user seating position of both possible sides of the longitudinal adjustment of the rail system. Furthermore, it is an object of the invention to form a seat position detection with memory function such that it can be mounted on conventional rail systems for motor vehicles or can be integrated into the rail.

The object is achieved by a mechanical seat position detection for a vehicle seat with a rail system comprising a vehicle-mounted tail rail and a longitudinally displaceable along the floor rail Seat rail, with a lock for the longitudinal adjustment of the rails to each other, wherein a mechanical memory device is mounted consisting of a position determination unit and a position detection unit which is symmetrically approachable from both directions of the longitudinal adjustment of a vehicle seat and defines a seating position.

The advantage here is that once the seat position is determined purely mechanically recovered from both extreme sides of a seat adjustment.

The longitudinal direction corresponds to the x-direction, the transverse direction corresponds to the y-direction, the vertical direction corresponds to the z-direction in the description and the associated drawings.

The term "engaging" means both a direct and an indirect positive connection.

list of figures

The invention will now be described by way of example with reference to the accompanying drawings.

• 1 eine perspektivische Ansicht auf einen Teilbereich eines Schienensystems,
• 2 eine Explosionsdarstellung eines Memoryblocks mit Positionsbestimmungseinheit und Positionsdetektionseinheit,
• 3a eine perspektivische Ansicht auf den Memoryblock ohne Gehäusedeckel,
• 3b eine schematische Darstellung einer beliebigen Position der Positionsbestimmungs- und Positionsdetektionseinheit,
• 3c eine schematische Darstellung der Positionsbestimmungs- und Positionsdetektionseinheit in einer Position zur Festlegung einer Memory Position,
• 4 eine Ansicht auf das Memoryrad, die Positionsdetektionseinheit und eine Entkoppelungseinheit,
• 5a einen perspektivischen Teilausschnitt des Schienensystems im Bereich einer Längsverstell- und Arretiereinheit; und
• 5b, c eine schematische Darstellung des Längsverstellhebels in zwei Positionen.

It shows:

• 1 a perspective view of a portion of a rail system,
• 2 an exploded view of a memory block with position determination unit and position detection unit,
• 3a a perspective view of the memory block without housing cover,
• 3b a schematic representation of an arbitrary position of the position determination and position detection unit,
• 3c a schematic representation of the position determination and position detection unit in a position for determining a memory position,
• 4 a view of the memory wheel, the position detection unit and a decoupling unit,
• 5a a perspective partial section of the rail system in the region of a Längsverstell- and locking unit; and
• 5b, c a schematic representation of the Längsverstellhebels in two positions.

All figures of the application are sketches that are intended to represent the seating position detection with memory function in the area of a rail system. The accompanying description is not on the full functionality of an adjustable vehicle seat. In particular, in the drawings, no levers and trains are shown, which are required to achieve the engagement and disengagement of the components.

In 1 is shown in a perspective partial view of an embodiment of a mechanical adjustment and seating position detection with memory function. A coordinate system shown in the figure K denotes the directions.

The main components of the seat position detection invention 1 are the rail system S , a memory device 5 with a position detection unit 7 and a position determination unit 6 , a locking unit 50 with longitudinal adjustment lever 51 and a decoupling unit 60 ,

An unillustrated motor vehicle seat is on the rail system S , Which has two pairs of parallel seat rails, longitudinally displaceable that is connected to the vehicle body in the x-direction. A pair of seat rails each have a vehicle-fixed connected floor rail 3 and one at the bottom rail 3 longitudinally displaceable mounted on the vehicle seat seat rail 2 on. The 1 shows a seat rail pair. The position of the motor vehicle seat is over the arranged in the region of the seat rail pairs locking unit 50 lockable, wherein the lock on the pivotally connected longitudinal adjustment lever 51 lifted by an occupant and the seat along the structure-fixed bottom rail 3 can be moved. The guide between bottom rail 3 and seat rail 2 is not described in detail, since it is well known and can be used in different embodiments.

The bottom rail 3 points to her to the opposite bottom rail 3 of the rail system S facing side surface a longitudinally extending rack 24 on. The seat rail 2 has a holding and adjustment bar 52 for displaceable storage of the memory device 5 in X direction. The holding and adjustment bar 52 is with the seat rail 2 connected, preferably is the holding and adjustment bar 52 welded. The holding and adjustment bar 52 is designed as a plate-shaped element and has two support rails 53 on that over the edge area of the seat rail 2 protrude into the space between the two seat rail pairs parallel spaced from the vehicle floor. The memory device 5 has for storage on the holding and adjusting bar 52 Corresponding adjustment strips 53a on. Details can be found in the 2 be seen.

The 2 shows in an exploded view of the memory device 5 as a position determination unit 6 executed memory block 15 , as well as a position detection unit 7 includes. The memory block 15 has a housing 54 and a housing cover 55 on. In the case 54 is a memory wheel 11 around an axis 26 rotatably mounted. The memory wheel 11 has on its in the z-direction upwardly facing side surface on a control block, which has a heart-shaped control cam 56 as a position determination unit 6 Has. The control curve 56 is designed so that it has two to one center line B Symmetric curves on which a point that runs along the curve moves towards or away from the axis of rotation. The control curve 56 has a recess 57 on. From the drawing 3c it can be seen that in the area of the lowest point of the indentation 57 the distance to the centerline of the axis 26 (Distance A ) compared to the other circumferential points of the control curve 56 is lowest. The memory wheel 11 has a wheel toothing 25 that have a wheel gear 58a one on an axis 48 stored gear stage 58 engaged. The gear stage 58 can with the rack 24 be engaged. A drive-effective connection between memory wheel 11 and bottom rail 3 can also be done via a frictional connection. The 3b shows the situation at the memory wheel 11 over the gear stage 58 engaged with the rack 24 stands. If now the seat rail 2 along the bottom rail 3 is moved, the memory wheel rotates 11 through the mesh with the bottom rail 3 meshing gear stage 58 in a defined transmission ratio to the bottom rail 3 , By this arrangement is a position of the bottom rail 3 to the seat rail 2 a twist angle α of the memory wheel 11 assigned.

In the 3c the procedure is canceled. This is done by adjusting the memory block 15 along the holding and adjusting bar 52 reached in the y direction. The adjustment movement of the memory block 15 is in the 3c through the arrow V displayed. An actuation of the adjustment takes place via a Bowden cable or a lever system. In this position meshes the gear stage 58 not with the rack 24 the bottom rail 3 and it can - as described in more detail later - set a memory position.

As it is from the 2 can be seen, includes the memory device 5 the position detection unit 7 holding a detection pen 9 " , a feather 20 and a cylindrical housing 59 includes. The detection pen 9 " extends perpendicular to the axis 26 in terms of the memory wheel 11 and lies over the spring 20 preloaded on the control curve 56 on. detection pen 9 " with feather 20 are in the case 59 stored, which on the housing 54 is fixed. In an embodiment not shown, the detection pen 9 " also in a parallel plane to the axis 26 be arranged, then the execution of the control curve 56 be adjusted accordingly.

To set a new memory position by a vehicle occupant of the memory block 15 in the direction of the arrow V from the rack 24 moved away, causing the gear stage 58 out of engagement with the rack 24 comes. The compression spring 20 pushes the detection pin 9 " against the control curve 56 and it becomes the memory wheel by the resulting force 11 in rotation around its axis 26 added. Here is the control curve 56 designed so that in any angular position of the memory wheel 11 an angle α of about 30 degrees (see drawing) between a tangent T at the circumference of the cam 56 and a plane extending in the y direction e perpendicular to the tip or end region of the detection pin 9 " exists so that a resultant force acts in the way that the memory wheel 11 in the direction of in 3c rotated position shown. The rotation of the memory wheel 11 ends when the detection pen 9 " yourself in the in 3c shown position where he is in the indentation 57 intervenes. Subsequently, the tooth level 58 again with the rack 24 the bottom rail 3 connected and the memory position is thus determined.

To recover the stored seating position (memory position), the user moves the vehicle seat relative to the floor rail 3 until a lock between seat rail 2 and bottom rail 3 via the locking unit 50 of the rail system S he follows.

To adjust the seat along the bottom rail 3 the user must first the longitudinal adjustment lever 51 around an axis 61 swing upwards. The axis 61 is aligned in the y direction. The pivoting movement is indicated by the arrow 62 shown. The longitudinal adjustment lever 51 is rotatable on a tube 63 stored. The pipe 63 is each end rotatable on the parallel spaced seat rails 2 stored. This is the tube 63 at a first end portion of a tab 64 welded. The tab 64 is at the opposite second end portion with a bolt 65 connected. The tab 64 is over the bolt 65 with the locking unit 50 coupled. The locking unit 50 is well known to the skilled person and will not be described in detail here. The locking unit 50 is between seat and floor rail 2 . 3 integrated and unlocked the mechanism when pulling up the Längsverstellhebels 51 , After unlocking the seat can along the bottom rail 3 be moved.

Between the longitudinal adjustment lever 51 and the locking unit 50 is a decoupling unit 60 arranged. The decoupling unit 60 essentially comprises one over an axis 66 rotatably mounted pawl 67 , The handle 67 is in mutually spaced bearing plates 68 stored, with the bearing plates 68 the pipe 63 engage around and on the longitudinal adjustment lever 51 are connected. In the normal position of use, the latch engages 67 via an intervention contour 71 in a recess 69 in the pipe 63 on. In engagement there is a positive connection between the pipe 63 and longitudinal adjustment lever 51 , When the memory position at which the detection pen 9 " into the indentation 57 the control curve 56 engages, is achieved, the connection between the longitudinal adjustment lever 51 and the one with the locking mechanism 50 connected tab 64 separated. In this position is the detection pin 9 " in a direction along the axis x in the direction of the arrow 70 shifted to the left position. In this position, the latch 67 over the axis 66 pivoted and the engagement contour 71 gets out of engagement with the recess 69 in the pipe 63 , As a result, the locking unit locks 50 the seat rail 2 in the bottom rail 3 ,

In this situation, the user can use the upwardly pulled longitudinal adjustment lever 51 let it go again, so that it is in the in 5b shown starting position pivoted.

Should be in an adjustment of the vehicle seat along the rail system S not be moved to the preset memory position, then the decoupling unit 60 be deactivated. This is done by locking the latch 67 so that these are no longer rotatable on the axle 66 is.

LIST OF REFERENCE NUMBERS

1

Seat position recognition

2

seat rail

3

bottom track

5

Memory device

6

Position Determination Entity

7

Position detection unit

9 "

detection pen

11

Memoryrad

15

Memory block

20

feather

24

rack

25

gear cogs

26

axis

48

axis

50

locking unit

51

Längsverstellhebel

52

Verstellleiste

53

retaining rails

53a

Verstellleiste

54

casing

55

housing cover

56

cam

57

indentation

58

gear stage

58a

gear cogs

59

casing

60

decoupling unit

61

axis

62

arrow

63

pipe

64

flap

65

bolt

66

axis

67

pawl

68

bearing plates

69

recess

70

arrow

71

engagement contour

72

actuator

A

distance

B

center line

e

level

K

coordinate system

S

rail system

T

tangent

V

arrow

α

corner

Claims (1)

Mechanical seat position detector (1) for a vehicle seat, which is guided with a seat rail (2) in a floor rail (3) of a vehicle, with a locking unit (50) for the longitudinal adjustment of the rails (2, 3) to each other, with a mechanical memory Device (5) comprising a position determination unit (6), a position detection unit (7) and a decoupling unit (60), wherein the position determination unit (6) from both directions Longitudinal adjustment of the vehicle seat is symmetrically approachable and defines a seating position, wherein the position determination unit (6) at least a memory block (15) with a memory wheel (11) and a Radverzahnung (25), wherein the memory wheel (11) via the Radverzahnung (25) directly or indirectly with a rack (24) of the bottom rail (3) is engaged and wherein the memory block (15) is so connected to the seat rail (2) that the engagement between the gear teeth (25) and rack (24) can be canceled, characterized in that the memory wheel (11) has on a side surface a control block having a symmetrically extending control cam (56) and at least one receptacle for a means of the position detection unit (7) formed as a recess (57), wherein the indentation (57) serves to determine the memory position, and wherein the position detection unit (7) comprises at least one detection pin (9 ") and a spring (20) sst, wherein the detection pin (9 ") is arranged such that it bears against the control cam (56) via a first end region biased by the spring (20), and wherein the detection pin (9") is connected to an actuating element (9 ") via a second end region. 72) of the decoupling unit (60), and in that the decoupling unit (60) comprises a pawl (67) rotatably mounted via an axle (66), wherein the pawl (67) has an engagement contour (71) and via the engagement contour (71 ) releasably engages in a recess (69) of an axis (61/66) connected to the locking unit (50), and in that the position detection pin (9 ") is releasably connected to the pawl (67) via the actuating element (72), wherein when the position pin (9 ") engages the recess (57) and is connected to the pawl (67), the pawl (67) is disengaged from the axis (61).

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